Ad serving

Delivery of online ads by a server to an end user's computer on which the ads are then displayed by a browser and/or cached (ads can be embedded in the page or served separately). Ad serving is normally performed either by a Web publisher or by a third-party ad server. The technology allows different online ads to be served in order to target different audience groups and can serve ads across multiple sites. Ad Technology providers each have their own proprietary models for this.